Hello,

What is the best method to deal with this issue? When I open my hip file all the COPernicus nodes cook then I instantly run out of vram (on a 4090). Then houdini is slow and xpu falls back on cpu only (if I try to render in solaris with karma). Sometimes I had to restart my PC. However, immediately after opening the scene I can run or use the cache manager to clear the cache. After that, it works as normal. I can continue adding nodes, rendering with xpu in solaris, etc.

How is it that I can just clear the cache and go back to doing things as normal? I can literally put the view flag on any node (after clearing the cache) and it will display instantly. I saw there is a environment variable to limit the amount of vram being used by COPs. Wondering what else I should do, it didnt seem like I should be hitting 24 gigs of vram so fast, am I just using too many nodes at too high a resolution (4k)?

thanks

I too have this issue. One of my previous scene with quite some COP networks would overload my vram when opening. I have a 5080 so 16gbs of vram but the scene was running fine previously.

I tried reopened the scene in 20.5, the vram usage would stable at about 9gbs. I think this vram issue is newly introduced with H21, dont think it has too much to do with too many cop node or resolution

I would try to lower the allowed vram usage in the Copernicus Settings

Cedric4826
I too have this issue. One of my previous scene with quite some COP networks would overload my vram when opening. I have a 5080 so 16gbs of vram but the scene was running fine previously.

I tried reopened the scene in 20.5, the vram usage would stable at about 9gbs. I think this vram issue is newly introduced with H21, dont think it has too much to do with too many cop node or resolution

Thanks for the reply. Sadly I cannot open this exact scene in the previous version to check, but I opened an earlier version of this hip (a version I was working on before houdini 21) and it pretty much did the same thing of using all the vram.

AslakKS
I would try to lower the allowed vram usage in the Copernicus Settings

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Thanks, this is way better (in my case) then setting the env variable because it looks like this gets saved into the hip, so I can set the vram limit in the scene. I missed this menu, so thanks.